Which of the following materials are used for preparing blur-black ink? 1 Ga

Which of the following materials are used for preparing
blur-black ink?

1 Gallic acid

2 Tannic acid

3 Ferrous sulphate

4 All of these

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Which of the following materials are used for preparing blur-black ink? 1 Gallic acid 2 Tanni..

Answer / guest

(4) All of these

Is This Answer Correct ?

2 Yes

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Which of the following materials are used for preparing blur-black ink? 1 Gallic acid 2 Tanni..

Answer / anand raj

1 gallic acid

Is This Answer Correct ?

1 Yes

1 No

Which of the following materials are used for preparing blur-black ink? 1 Gallic acid 2 Tanni..

Answer / raj thakre

tannic acid

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0 Yes

1 No

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